JP3718540B2 - Method for correcting metered water when making ready-mixed concrete - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a method for correcting metered water in a ready-mixed concrete manufacturing plant for manufacturing ready-mixed concrete.
[0002]
[Prior art]
In a ready-mixed concrete production plant, gravel, sand, cement, water, admixture, etc., which are concrete materials, are measured in a measuring tank via an operation panel, and the measured material is put into a mixer and kneaded to manufacture ready-mixed concrete. Yes.
[0003]
And the surface water adheres to the sand which is one of the concrete materials, and when the ready-mixed concrete is manufactured, the surface water of the sand is subtracted to measure the kneaded water. Changes from time to time, and when the set surface water ratio is less than the actual surface water ratio, the amount of metered water increases, and the finished ready-mixed concrete becomes larger than the desired slump value and becomes soft ready-mixed concrete. End up. Therefore, the next batch often corresponds to the desired slump value by changing the setting of the surface water ratio of the sand on the operation panel.
[0004]
[Problems to be solved by the invention]
However, it is troublesome to convert the corrected water amount to be corrected to the surface water ratio. Generally, the surface water ratio is often set and changed appropriately empirically. Operation is quite difficult.
[0005]
Also, in the conventional ready-mixed concrete production plant, the entire amount of metered water is fed into the mixer, so if the amount of metered water is large, the discharge cannot be stopped at an appropriate value and left in the metering tank. It has a configuration.
[0006]
In view of the above points, the present invention provides a method for correcting metered water during the production of ready-mixed concrete that makes it easy to correct the amount of metered-water mixer input and that can be easily applied to an existing ready-mixed concrete production plant. The purpose is to do.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention connects a metering water correction device for adjusting the amount of metered water input to the operation panel of the ready-mixed concrete manufacturing plant, and starts measuring the measured water from the operation panel to the metering water correction device in advance. The time point and the measurement completion time are taken in, and the correlation between the measurement value and the measurement time between them is calculated for the range up to the maximum measurement value and stored as measurement calibration data. Similarly, the measurement water discharge start time and discharge completion time point and takes in storing the correlation between the emission and the release time as release calibration data to compute the range to completion emitted from the maximum metric value, when fresh concrete production, metering time of mixing water with the gauging water correction device It was measured, as well as estimates the weight value of mixing water from the metering calibration data and the metering time, if the metering water correction is required not release percentage of gauging water The residual water proportion of whether to remain in advance input into the gauging water correction device determines the actual emissions actually released from the weighing value and the remaining water ratio of the mixing water, the release time for said actual emissions It is determined from the discharge calibration data, and discharge of the metering water is stopped when the discharge time has elapsed from the start of the discharge of the metering water.
[0008]
[Action]
According to the measuring water correction method of the present invention, a measuring water correction device for adjusting the amount of metering water input is connected to the operation panel, and the ready-mixed concrete is obtained from the measurement calibration data obtained by calculating the weighing signal and the measurement data from the operation panel in advance. The actual measurement value is calculated from the measurement water measurement time at the time of manufacture. And when correction is required, if the operator inputs the remaining water ratio (ratio of measured water not released) to the actual measured value, the discharge amount taking this remaining water ratio into account is calculated, and The release time is calculated from the release calibration data calculated in advance.
[0009]
The operation release by outputting an open signal of the release control valve weighing water from the gauging water corrector side by gauging water release command from the panel side is started, and starts measuring the discharge time in the gauging water correcting apparatus, When the calculated discharge time is reached, the metering water correction device side outputs a close signal of the metering water discharge control valve to stop the metering water discharge. In this manner, the metering water mixer input amount can be freely adjusted by outputting the metering water discharge and discharge stop signals from the metering water correction device side. In addition, if this measured water correction apparatus is connected to the operation panel of an existing raw concrete manufacturing plant, it is possible to easily correct the amount of metered water added to the mixer in the existing plant.
[0010]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0011]
Reference numeral 1 denotes a mixer for kneading various concrete materials, and a kneading blade 2 disposed inside is rotated at a predetermined speed by a mixer driving motor 3. Above the mixer 1, various measuring tanks (not shown) for gravel, sand, cement and the like and a water measuring tank 5 supported by the weight detector 4 are arranged. A discharge control valve 6 for controlling the discharge amount of the metered water is disposed below the water metering tank 5. A water storage tank 7 is disposed above the water metering tank 5, and a main water drain pipe 9 having a water metering valve 8 and a main drain pipe 9 are branched to the lower part of the water tank 7, and a correction water control valve is provided. A sub-drain pipe 11 having 10 is disposed.
[0012]
Then, a predetermined amount of water discharged by the open / close control of the water metering valve 8 is weighed in the water metering tank 5 and charged into the mixer 1 as metered water, and the correction water control valve 10 is opened / closed when the water amount is insufficient. Thus, a predetermined amount can be input to the mixer 1.
[0013]
A load power detector 12 for detecting the load power of the motor is connected to the motor 3 for driving the mixer, and a signal detected by the load power detector 12 is input to the metered water correction device 13.
[0014]
The metered water correction device 13 includes a control unit 14 that takes in various data and controls the various control valves of the metered water, a calculation unit 15 that calculates various types of data and signals, a storage unit 16 that stores various types of data, and the like. It is made up.
[0015]
The metering water correction device 13 is connected to the operation panel 17, and the metering water correction device 13 fetches data such as a measurement signal, a release signal, and a measurement value from the operation panel 17 when measuring with the operation panel 17. It has become. Further, the opening / closing control of the discharge control valve 6 and the correction water control valve 10 of the water metering tank 5 can be performed.
[0016]
Next, the procedure for correcting metered water in the metered water correction device will be described based on the flowcharts shown in FIGS. In the figure, S1 to S28 represent steps of the correction procedure.
[0017]
First, as an initial setting prior to the start of plant operation, weighed calibration data in the maximum metering range of the water metering tank 5 regarding the correlation between the metered water measurement value and the metering time and the correlation between the metered water discharge amount and the discharge time. And release calibration data.
[0018]
First, it is determined whether or not a measurement start signal has been received from the operation panel 17 (S1). If it has not been received yet, reception is awaited. If received, the elapsed time from the start of measurement is read (S2) and the measured water The measured value is read (S3). The read elapsed time and the measured value are stored in the storage unit 16 (S4).
[0019]
Here, it is determined whether or not the measured value has reached the maximum measured value of the water measuring tank 5 (S5). If the measured value has not reached the measured value yet, the process returns to step S2 to repeat each step from the elapsed time reading. And memorize the elapsed time and the measured value. When the maximum measured value is reached, the weighing calibration data regarding the correlation between the elapsed time and the weighing value is calculated from the stored elapsed time and the weighing value (S6), and this weighing calibration data is stored in the storage unit 16 (S7). ). Since the capacity of the water storage amount 7 is large, the measurement calibration data is data represented by a substantially linear graph.
[0020]
Next, it is determined whether or not a discharge start signal has been received from the water metering tank 5 (S8). If the discharge signal has not been received yet, the process waits for reception. If it has been received, the elapsed time from the start of discharge is read. Along with (S9), the discharge amount is read (S10). The read elapsed time and discharge amount are stored in the storage unit 16 (S11).
[0021]
Here, it is determined whether or not the release is completed (S12). If the release is not completed, the process returns to step S9 to repeat the steps from reading the elapsed time and store the elapsed time and the released amount. When the release is completed, the release calibration data regarding the correlation between the elapsed time and the release amount is calculated from the stored elapsed time and the release amount (S13), and this release calibration data is stored in the storage unit 16 (S14). This discharge calibration data shows that the head pressure decreases as the measured water stored in the water measuring tank 5 decreases due to the discharge, and the discharge amount increases at the beginning, but the discharge amount decreases toward the completion of the discharge and becomes a parabola. The data is represented by a close graph.
[0022]
In this way, in the initial setting, the elapsed time at the time of metering and discharge of metered water and the data relating to metering and discharge are stored as calibration data.
[0023]
Next, when the production of ready-mixed concrete is started, first, the weighing calibration data is read (S16) and the emission calibration data is read (S17). It is determined whether or not a measurement start signal has been received from the operation panel 17 side (S18). If the measurement start signal has not been received yet, reception is awaited. If received, the elapsed time from the start of measurement is measured (S19). Next, it is determined whether or not a measurement completion signal has been received from the operation panel 17 side (S20). If the measurement completion signal has not been received yet, the measurement of the elapsed time is continued. The measured value is then calculated (S21).
[0024]
Here, the operator inputs the remaining water ratio (residual water amount%), which is data indicating how much water remains in the water measuring tank 5 with respect to the measured water amount (S22), and for the calculated measured value The remaining water amount is calculated (S23). A discharge amount actually discharged is calculated from the calculated measurement value and the remaining water amount (S24). With respect to the calculated release amount, the release time is calculated from the release calibration data (S25). Then, the discharge control valve 6 is opened from the metering water correction device 13 side to discharge metered water to the mixer 1 (S27), and when the calculated discharge time has elapsed, the discharge control valve 6 is closed (S27). Thus, a desired amount of residual water is left to produce ready-mixed concrete having an appropriate slump value, flow value, and the like.
[0025]
When the above flow is completed, it is determined whether or not to end the operation (S28). If the operation is continued, the process returns to step S18 to repeat each step from the waiting for the measurement start signal. To do.
[0026]
Further, when the amount of metered water is corrected to increase, it is replenished by opening the correction water control valve 10 from the metered water correction device 13 for a predetermined time.
[0027]
Although the discharge control valve 6 and the correction water control valve 10 are opened and closed according to the control command of the metering water correction device 13, a control signal is transmitted from the metering water correction device 13 to the operation panel 17 and the operation panel 17 is operated. The opening / closing operation of the discharge control valve 6 and the correction water control valve 10 may be performed from the side.
[0028]
【The invention's effect】
As described above, in the metered water correction method according to the present invention, the correlation between the metering time and the discharge time with respect to the metering and discharge in advance up to the maximum metering range of the water metering tank 5 is determined by the weighing calibration data and the discharge calibration data. Calculate the measured value from the measurement time of the measured water during the production of ready-mixed concrete, calculate the actual discharge amount by subtracting the preset remaining water amount, and calculate the release time from the calibration data for the actual discharge amount In addition, since the opening / closing control of the metering water discharge control valve is performed based on the discharge time, correction of the metering water into the mixer can be facilitated, and a raw concrete having a desired quality can be manufactured. . Further, if the metered water correction device 13 is connected to the operation panel 17 of an existing raw concrete manufacturing plant, it is possible to easily correct the amount of metered water added to the mixer in the existing plant, which is very convenient.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a main part of a ready-mixed concrete production plant.
FIG. 2 is a flowchart showing a procedure of a metered water correction method of the present invention.
FIG. 3 is a flowchart showing a procedure of a metered water correction method of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Mixer 5 ... Water measuring tank 6 ... Discharge control valve 10 ... Correction water control valve 13 ... Metering water correction apparatus 17 ... Control panel

Claims (1)

A measuring water correction device that adjusts the amount of metered water input is connected to the operation panel of the ready-mixed concrete plant, and the metering water correction device takes in the metering water correction device from the operation panel in advance, and the measurement value between them And the measurement time is calculated for the range up to the maximum measurement value and stored as measurement calibration data. Similarly, the measurement water discharge start time and discharge completion time are taken in, and the relationship between the discharge amount and the discharge time between them is calculated. The relationship is calculated for the range from the maximum measurement value to the completion of discharge and stored as discharge calibration data. During the preparation of ready-mixed concrete, the measurement time of the kneaded water is measured by the measurement water correction device, and the measurement time and the measurement calibration data are measured. wherein with estimates the weight value of mixing water, the residual water proportion of whether to remain without releasing percentage of gauging water if correction is required for weighing the amount of water from Previously input to the weight aqueous correction device, actually the actual emissions determined to be emitted from the weighing value and the remaining water ratio of the mixing water, to determine the release time for said actual emission from the emitting calibration data, the gauging water A method for correcting metered water during the production of ready-mixed concrete, wherein the discharge of metered water is stopped when the discharge time elapses from the start of the discharge of slag.

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